Delta waves refer to the type of brainwaves that are produced when we are in deep sleep or unconsciousness. These slow and powerful waves help our brain to relax and regenerate, allowing us to have a restful sleep. Full definition
Cortical Regional Differences of Delta Waves During All - Night Sleep in Schizophrenia. (verywellmind.com)
Neuroscientist mapping the brain states accessed during meditation say that meditation slows the patterns called delta waves. (yogauonline.com)
This stimulation restored normal delta wave activity in the rats» frontal cortex and normalized the rats» performance on the timing test. (sciencedaily.com)